hypothyroidism

The story

1. Proto-Indo-European*upó
2. Ancient Greekῠ̔πό (hŭpó)
3. Ancient Greekὑπο- (hupo-)
4. Englishhypo-
5. Proto-Indo-European*dʰwer-
6. Proto-Hellenic*tʰurā
7. Ancient Greekθῠ́ρᾱ (thŭ́rā)
8. Ancient Greekθῠρεός (thŭreós)
9. Proto-Indo-European*weyd-
10. Proto-Indo-European*wéydos
11. Proto-Hellenic*wéidos
12. Ancient Greekεἶδος (eîdos)
13. Ancient Greekθῠρεοειδής (thŭreoeidḗs)
14. New Latinthyreoīdēs
15. Englishthyroid
16. English todayhypothyroidism

Coined c. between 1900 and 1905 from hypo- (“under”) + thyroid + -ism.

First known use, by meaning

• from 1900s The disease state caused by insufficient production of thyroid hormone by the thyroid gland.